Dn loop bound box benchmark

Benchmarks/Benchmarks/NIOCoreBenchmarks/Benchmarks.swift

@@ -41,4 +41,11 @@ let benchmarks = {
             blackHole(asyncChanel)
         }
     }
+
+    Benchmark(
+        "NIOLoopBoundBox.value",
+        configuration: .init(metrics: defaultMetrics, scalingFactor: .kilo)
+    ) { benchmark in
+        runNIOLoopBoundBoxInPlaceMutation(benchmark: benchmark)
+    }
 }

Benchmarks/Benchmarks/NIOCoreBenchmarks/NIOLoopBoundBox.swift

@@ -0,0 +1,35 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the SwiftNIO open source project
+//
+// Copyright (c) 2024 Apple Inc. and the SwiftNIO project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+// See CONTRIBUTORS.txt for the list of SwiftNIO project authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+
+import NIOCore
+import NIOEmbedded
+import Benchmark
+
+func runNIOLoopBoundBoxInPlaceMutation(benchmark: Benchmark) {
+    let embeddedEventLoop = EmbeddedEventLoop()
+    let boundBox = NIOLoopBoundBox([Int](), eventLoop: embeddedEventLoop)
+    boundBox.value.reserveCapacity(1)
+
+    benchmark.startMeasurement()
+
+    for _ in benchmark.scaledIterations {
+        boundBox.value.removeAll(keepingCapacity: true)
+        boundBox.value.append(1)
+    }
+
+    benchmark.stopMeasurement()
+
+    precondition(boundBox.value.count == 1)
+    precondition(boundBox.value.reduce(0, +) == 1)
+}

Benchmarks/Thresholds/5.10/NIOCoreBenchmarks.NIOAsyncChannel.init.p90.json

@@ -1,3 +1,3 @@
 {
   "mallocCountTotal" : 10
-}
+}

Benchmarks/Thresholds/5.10/NIOCoreBenchmarks.NIOLoopBoundBox.value.p90.json

@@ -0,0 +1,3 @@
+{
+  "mallocCountTotal" : 0
+}

Benchmarks/Thresholds/5.10/NIOPosixBenchmarks.TCPEcho.p90.json

@@ -1,3 +1,3 @@
 {
-  "mallocCountTotal" : 108
-}
+  "mallocCountTotal" : 90
+}

Benchmarks/Thresholds/5.10/NIOPosixBenchmarks.TCPEchoAsyncChannel.p90.json

@@ -1,3 +1,3 @@
 {
-  "mallocCountTotal" : 165000
-}
+  "mallocCountTotal" : 164212
+}

Benchmarks/Thresholds/5.8/NIOCoreBenchmarks.NIOAsyncChannel.init.p90.json

@@ -1,3 +1,3 @@
 {
   "mallocCountTotal" : 10
-}
+}

Benchmarks/Thresholds/5.8/NIOCoreBenchmarks.NIOLoopBoundBox.value.p90.json

@@ -0,0 +1,3 @@
+{
+  "mallocCountTotal" : 0
+}

Benchmarks/Thresholds/5.8/NIOPosixBenchmarks.TCPEcho.p90.json

@@ -1,3 +1,3 @@
 {
-  "mallocCountTotal" : 110
-}
+  "mallocCountTotal" : 92
+}

Benchmarks/Thresholds/5.9/NIOCoreBenchmarks.NIOAsyncChannel.init.p90.json

@@ -1,3 +1,3 @@
 {
   "mallocCountTotal" : 10
-}
+}

Benchmarks/Thresholds/5.9/NIOCoreBenchmarks.NIOLoopBoundBox.value.p90.json

@@ -0,0 +1,3 @@
+{
+  "mallocCountTotal" : 0
+}

Benchmarks/Thresholds/5.9/NIOPosixBenchmarks.TCPEcho.p90.json

@@ -1,3 +1,3 @@
 {
-  "mallocCountTotal" : 110
-}
+  "mallocCountTotal" : 92
+}

Benchmarks/Thresholds/5.9/NIOPosixBenchmarks.TCPEchoAsyncChannel.p90.json

@@ -1,3 +1,3 @@
 {
-  "mallocCountTotal" : 164000
-}
+  "mallocCountTotal" : 164216
+}

Benchmarks/Thresholds/nightly-main/NIOCoreBenchmarks.NIOAsyncChannel.init.p90.json

@@ -1,3 +1,3 @@
 {
   "mallocCountTotal" : 10
-}
+}

Benchmarks/Thresholds/nightly-main/NIOCoreBenchmarks.NIOLoopBoundBox.value.p90.json

@@ -0,0 +1,3 @@
+{
+  "mallocCountTotal" : 0
+}

Benchmarks/Thresholds/nightly-main/NIOPosixBenchmarks.TCPEcho.p90.json

@@ -1,3 +1,3 @@
 {
-  "mallocCountTotal" : 108
-}
+  "mallocCountTotal" : 90
+}

Benchmarks/Thresholds/nightly-main/NIOPosixBenchmarks.TCPEchoAsyncChannel.p90.json

@@ -1,3 +1,3 @@
 {
-  "mallocCountTotal" : 165000
-}
+  "mallocCountTotal" : 164210
+}

Benchmarks/Thresholds/nightly-next/NIOCoreBenchmarks.NIOAsyncChannel.init.p90.json

@@ -1,3 +1,3 @@
 {
   "mallocCountTotal" : 10
-}
+}

Benchmarks/Thresholds/nightly-next/NIOCoreBenchmarks.NIOLoopBoundBox.value.p90.json

@@ -0,0 +1,3 @@
+{
+  "mallocCountTotal" : 0
+}

Benchmarks/Thresholds/nightly-next/NIOPosixBenchmarks.TCPEcho.p90.json

@@ -1,3 +1,3 @@
 {
-  "mallocCountTotal" : 108
-}
+  "mallocCountTotal" : 90
+}

Benchmarks/Thresholds/nightly-next/NIOPosixBenchmarks.TCPEchoAsyncChannel.p90.json

@@ -1,3 +1,3 @@
 {
-  "mallocCountTotal" : 165000
-}
+  "mallocCountTotal" : 164206
+}